Mom and dad wanted a Windows XP reboot on their Wind U100 and I am thinking of installing an SSD to help speed it up. It's already got 2GB of ram, so really, only the storage can be upgraded. What a good cheap SATA 2 SSD that would fit this? Only need 60GB at the most.

Get the cheapest SSD you can find that is not SandForce based. You will not get the full power from any SSD as the onboard storage controller is well...low power. Your first concern should be its ITGC abilities. XP means no TRIM...and no TRIM means IDLE TIME is going to be needed to keep it "fast".

TBH I would look at the Vertex PLUS series or the Kingston V series. Both can be found for cheap now. The Indi Martini should be faster than the older JM based controller (toshiba branded) found in the SSDnow V.